Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Qual é a perna de fora com uma oposição que é aarhus gymnastik forening?
 ###Tabelas: CREATE TABLE matches_in_europe (matches_in_europe_id AUTO_INCREMENT PRIMARY KEY, Competition VARCHAR, Round VARCHAR, Opposition VARCHAR, Home Leg VARCHAR, Away Leg VARCHAR) CREATE TABLE series_three (series_three_id AUTO_INCREMENT PRIMARY KEY, # INT, Title VARCHAR, Original airdate VARCHAR, Timeslot VARCHAR, Viewers (millions) VARCHAR, Nightly rank INT, Weekly rank INT) CREATE TABLE managerial_head_coach_changes (managerial_head_coach_changes_id AUTO_INCREMENT PRIMARY KEY, Team VARCHAR, Outgoing manager VARCHAR, Manner of departure VARCHAR, Date of vacancy VARCHAR, Incoming manager VARCHAR, Date of appointment VARCHAR) CREATE TABLE special_stages (special_stages_id AUTO_INCREMENT PRIMARY KEY, Stage VARCHAR, Time (EEST) VARCHAR, Name VARCHAR, Length VARCHAR, Winner VARCHAR, Rally leader VARCHAR) CREATE TABLE editions_feature_grid (editions_feature_grid_id AUTO_INCREMENT PRIMARY KEY, Product VARCHAR, Extensions VARCHAR, Projects templates VARCHAR, MSDN integration VARCHAR, Debugging VARCHAR, Profiling VARCHAR, IntelliTrace VARCHAR, Unit test VARCHAR, Code coverage VARCHAR, Test impact analysis VARCHAR, Load testing VARCHAR, Lab management VARCHAR, Architecture and modelling VARCHAR, Windows Phone development VARCHAR)  
SELECT Away Leg FROM matches_in_europe WHERE Opposition = aarhus gymnastik forening